整数到字符串转换/整数字符串连接在C ++ - 更紧凑的解决方案？ [英] integer to string conversion / integer-string concatenation in C++ - more compact solutions?

问题描述

如何做整数 - >字符串转换已经在互联网上多次回答...但是，我正在寻找最紧凑的C ++ - 方式这样做。

How to do integer -> string conversion has been answered many times on the internet... however, I'm looking for the most compact "C++-way" to do this.

因为你能够使用重载的+运算符连接字符串，所以最好能够沿着python-ish的行做一些事情
x =（stringVariable + str（intVariable） ）连接，但我不知道如果有一个规范的方式来做这个在C + +。

Since you're able to concatenate strings using the overloaded + operator, it would be preferable to be able to do something along the lines of the python-ish x = (stringVariable + str(intVariable)) concatenation, but I don't know if there's a canonical way to do this in C++.

我看到的最常见的解决方案是：

The most common solutions I see are:

stringstream：如果可能的话， 3行代码（声明，写入流，转换为字符串）只是为了连接一些字母和数字。

stringstream: If possible, it would be nice not to have 3 lines of code (declaration, writing to the stream, conversion to string) just to concatenate some letters and numbers.

itoa：一个规范的C ++解决方案。此外，我认为itoa在技术上是非标准的，虽然我可能是错误的。

itoa: this works, but I'm looking for a canonical C++ solution. Also, I think itoa is technically non-standard although I could be wrong.

boost格式/ boost词法铸造：这也工作，但在香草C ++

boost format / boost lexical cast: this works too, but is there nothing in vanilla C++ that does the job?

推荐答案

#include <string>

字符串到整数： int n = std :: stoi（s）

整数到字符串： std :: string s = std :: to_string（n）;

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